The first two sentences in the post attempt to show that there is a significant split in the United States between liturgical churches and free churches.

According to data from the National Congregations Study (2006-2007), 38%
of people in the United States associate themselves with liturgical
churches (Roman Catholic, Lutheran, Episcopal, etc.); while 46%
associate themselves with free churches (Baptist, Pentecostal,
non-denominational, etc.). The 14% of people associated with Methodist
and Reformed/Presbyterian churches sit atop this watershed—some sliding
down the liturgical slope, others down the free church slope.

The data I draw from in these sentences is from the following chart. I have marked the liturgical numbers yellow, free church numbers pink and Reformed/Methodist green.

The first two sentences in the post attempt to show that there is a significant split in the United States between liturgical churches and free churches.

According to data from the National Congregations Study (2006-2007), 38%
of people in the United States associate themselves with liturgical
churches (Roman Catholic, Lutheran, Episcopal, etc.); while 46%
associate themselves with free churches (Baptist, Pentecostal,
non-denominational, etc.). The 14% of people associated with Methodist
and Reformed/Presbyterian churches sit atop this watershed—some sliding
down the liturgical slope, others down the free church slope.

The data I draw from in these sentences is from the following chart. I have marked the liturgical numbers yellow, free church numbers pink and Reformed/Methodist green.